1 files changed, 588 insertions, 0 deletions

diff --git a/drivers/gpu/drm/gma500/intel_bios.c b/drivers/gpu/drm/gma500/intel_bios.c
new file mode 100644
index 000000000..8245b5603
--- /dev/null
+++ b/drivers/gpu/drm/gma500/intel_bios.c
@@ -0,0 +1,588 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2006 Intel Corporation
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ */
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm.h>
+
+#include "intel_bios.h"
+#include "psb_drv.h"
+#include "psb_intel_drv.h"
+#include "psb_intel_reg.h"
+
+#define	SLAVE_ADDR1	0x70
+#define	SLAVE_ADDR2	0x72
+
+static void *find_section(struct bdb_header *bdb, int section_id)
+{
+	u8 *base = (u8 *)bdb;
+	int index = 0;
+	u16 total, current_size;
+	u8 current_id;
+
+	/* skip to first section */
+	index += bdb->header_size;
+	total = bdb->bdb_size;
+
+	/* walk the sections looking for section_id */
+	while (index < total) {
+		current_id = *(base + index);
+		index++;
+		current_size = *((u16 *)(base + index));
+		index += 2;
+		if (current_id == section_id)
+			return base + index;
+		index += current_size;
+	}
+
+	return NULL;
+}
+
+static void
+parse_edp(struct drm_psb_private *dev_priv, struct bdb_header *bdb)
+{
+	struct bdb_edp *edp;
+	struct edp_power_seq *edp_pps;
+	struct edp_link_params *edp_link_params;
+	uint8_t	panel_type;
+
+	edp = find_section(bdb, BDB_EDP);
+
+	dev_priv->edp.bpp = 18;
+	if (!edp) {
+		if (dev_priv->edp.support) {
+			DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported, assume %dbpp panel color depth.\n",
+				      dev_priv->edp.bpp);
+		}
+		return;
+	}
+
+	panel_type = dev_priv->panel_type;
+	switch ((edp->color_depth >> (panel_type * 2)) & 3) {
+	case EDP_18BPP:
+		dev_priv->edp.bpp = 18;
+		break;
+	case EDP_24BPP:
+		dev_priv->edp.bpp = 24;
+		break;
+	case EDP_30BPP:
+		dev_priv->edp.bpp = 30;
+		break;
+	}
+
+	/* Get the eDP sequencing and link info */
+	edp_pps = &edp->power_seqs[panel_type];
+	edp_link_params = &edp->link_params[panel_type];
+
+	dev_priv->edp.pps = *edp_pps;
+
+	DRM_DEBUG_KMS("EDP timing in vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
+				dev_priv->edp.pps.t1_t3, dev_priv->edp.pps.t8,
+				dev_priv->edp.pps.t9, dev_priv->edp.pps.t10,
+				dev_priv->edp.pps.t11_t12);
+
+	dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 :
+		DP_LINK_BW_1_62;
+	switch (edp_link_params->lanes) {
+	case 0:
+		dev_priv->edp.lanes = 1;
+		break;
+	case 1:
+		dev_priv->edp.lanes = 2;
+		break;
+	case 3:
+	default:
+		dev_priv->edp.lanes = 4;
+		break;
+	}
+	DRM_DEBUG_KMS("VBT reports EDP: Lane_count %d, Lane_rate %d, Bpp %d\n",
+			dev_priv->edp.lanes, dev_priv->edp.rate, dev_priv->edp.bpp);
+
+	switch (edp_link_params->preemphasis) {
+	case 0:
+		dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
+		break;
+	case 1:
+		dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
+		break;
+	case 2:
+		dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
+		break;
+	case 3:
+		dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
+		break;
+	}
+	switch (edp_link_params->vswing) {
+	case 0:
+		dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
+		break;
+	case 1:
+		dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
+		break;
+	case 2:
+		dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
+		break;
+	case 3:
+		dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
+		break;
+	}
+	DRM_DEBUG_KMS("VBT reports EDP: VSwing  %d, Preemph %d\n",
+			dev_priv->edp.vswing, dev_priv->edp.preemphasis);
+}
+
+static u16
+get_blocksize(void *p)
+{
+	u16 *block_ptr, block_size;
+
+	block_ptr = (u16 *)((char *)p - 2);
+	block_size = *block_ptr;
+	return block_size;
+}
+
+static void fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
+			struct lvds_dvo_timing *dvo_timing)
+{
+	panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
+		dvo_timing->hactive_lo;
+	panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
+		((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
+	panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
+		dvo_timing->hsync_pulse_width;
+	panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
+		((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
+
+	panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
+		dvo_timing->vactive_lo;
+	panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
+		dvo_timing->vsync_off;
+	panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
+		dvo_timing->vsync_pulse_width;
+	panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
+		((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
+	panel_fixed_mode->clock = dvo_timing->clock * 10;
+	panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
+
+	if (dvo_timing->hsync_positive)
+		panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
+	else
+		panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
+
+	if (dvo_timing->vsync_positive)
+		panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
+	else
+		panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
+
+	/* Some VBTs have bogus h/vtotal values */
+	if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
+		panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
+	if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
+		panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
+
+	drm_mode_set_name(panel_fixed_mode);
+}
+
+static void parse_backlight_data(struct drm_psb_private *dev_priv,
+				struct bdb_header *bdb)
+{
+	struct bdb_lvds_backlight *vbt_lvds_bl = NULL;
+	struct bdb_lvds_backlight *lvds_bl;
+	u8 p_type = 0;
+	void *bl_start = NULL;
+	struct bdb_lvds_options *lvds_opts
+				= find_section(bdb, BDB_LVDS_OPTIONS);
+
+	dev_priv->lvds_bl = NULL;
+
+	if (lvds_opts)
+		p_type = lvds_opts->panel_type;
+	else
+		return;
+
+	bl_start = find_section(bdb, BDB_LVDS_BACKLIGHT);
+	vbt_lvds_bl = (struct bdb_lvds_backlight *)(bl_start + 1) + p_type;
+
+	lvds_bl = kmemdup(vbt_lvds_bl, sizeof(*vbt_lvds_bl), GFP_KERNEL);
+	if (!lvds_bl) {
+		dev_err(dev_priv->dev.dev, "out of memory for backlight data\n");
+		return;
+	}
+	dev_priv->lvds_bl = lvds_bl;
+}
+
+/* Try to find integrated panel data */
+static void parse_lfp_panel_data(struct drm_psb_private *dev_priv,
+			    struct bdb_header *bdb)
+{
+	struct bdb_lvds_options *lvds_options;
+	struct bdb_lvds_lfp_data *lvds_lfp_data;
+	struct bdb_lvds_lfp_data_entry *entry;
+	struct lvds_dvo_timing *dvo_timing;
+	struct drm_display_mode *panel_fixed_mode;
+
+	/* Defaults if we can't find VBT info */
+	dev_priv->lvds_dither = 0;
+	dev_priv->lvds_vbt = 0;
+
+	lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
+	if (!lvds_options)
+		return;
+
+	dev_priv->lvds_dither = lvds_options->pixel_dither;
+	dev_priv->panel_type = lvds_options->panel_type;
+
+	if (lvds_options->panel_type == 0xff)
+		return;
+
+	lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
+	if (!lvds_lfp_data)
+		return;
+
+
+	entry = &lvds_lfp_data->data[lvds_options->panel_type];
+	dvo_timing = &entry->dvo_timing;
+
+	panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode),
+				      GFP_KERNEL);
+	if (panel_fixed_mode == NULL) {
+		dev_err(dev_priv->dev.dev, "out of memory for fixed panel mode\n");
+		return;
+	}
+
+	dev_priv->lvds_vbt = 1;
+	fill_detail_timing_data(panel_fixed_mode, dvo_timing);
+
+	if (panel_fixed_mode->htotal > 0 && panel_fixed_mode->vtotal > 0) {
+		dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode;
+		drm_mode_debug_printmodeline(panel_fixed_mode);
+	} else {
+		dev_dbg(dev_priv->dev.dev, "ignoring invalid LVDS VBT\n");
+		dev_priv->lvds_vbt = 0;
+		kfree(panel_fixed_mode);
+	}
+	return;
+}
+
+/* Try to find sdvo panel data */
+static void parse_sdvo_panel_data(struct drm_psb_private *dev_priv,
+		      struct bdb_header *bdb)
+{
+	struct bdb_sdvo_lvds_options *sdvo_lvds_options;
+	struct lvds_dvo_timing *dvo_timing;
+	struct drm_display_mode *panel_fixed_mode;
+
+	dev_priv->sdvo_lvds_vbt_mode = NULL;
+
+	sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
+	if (!sdvo_lvds_options)
+		return;
+
+	dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
+	if (!dvo_timing)
+		return;
+
+	panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
+
+	if (!panel_fixed_mode)
+		return;
+
+	fill_detail_timing_data(panel_fixed_mode,
+			dvo_timing + sdvo_lvds_options->panel_type);
+
+	dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode;
+
+	return;
+}
+
+static void parse_general_features(struct drm_psb_private *dev_priv,
+		       struct bdb_header *bdb)
+{
+	struct bdb_general_features *general;
+
+	/* Set sensible defaults in case we can't find the general block */
+	dev_priv->int_tv_support = 1;
+	dev_priv->int_crt_support = 1;
+
+	general = find_section(bdb, BDB_GENERAL_FEATURES);
+	if (general) {
+		dev_priv->int_tv_support = general->int_tv_support;
+		dev_priv->int_crt_support = general->int_crt_support;
+		dev_priv->lvds_use_ssc = general->enable_ssc;
+
+		if (dev_priv->lvds_use_ssc) {
+			dev_priv->lvds_ssc_freq
+				= general->ssc_freq ? 100 : 96;
+		}
+	}
+}
+
+static void
+parse_sdvo_device_mapping(struct drm_psb_private *dev_priv,
+			  struct bdb_header *bdb)
+{
+	struct sdvo_device_mapping *p_mapping;
+	struct bdb_general_definitions *p_defs;
+	struct child_device_config *p_child;
+	int i, child_device_num, count;
+	u16	block_size;
+
+	p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
+	if (!p_defs) {
+		DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
+		return;
+	}
+	/* judge whether the size of child device meets the requirements.
+	 * If the child device size obtained from general definition block
+	 * is different with sizeof(struct child_device_config), skip the
+	 * parsing of sdvo device info
+	 */
+	if (p_defs->child_dev_size != sizeof(*p_child)) {
+		/* different child dev size . Ignore it */
+		DRM_DEBUG_KMS("different child size is found. Invalid.\n");
+		return;
+	}
+	/* get the block size of general definitions */
+	block_size = get_blocksize(p_defs);
+	/* get the number of child device */
+	child_device_num = (block_size - sizeof(*p_defs)) /
+				sizeof(*p_child);
+	count = 0;
+	for (i = 0; i < child_device_num; i++) {
+		p_child = &(p_defs->devices[i]);
+		if (!p_child->device_type) {
+			/* skip the device block if device type is invalid */
+			continue;
+		}
+		if (p_child->slave_addr != SLAVE_ADDR1 &&
+			p_child->slave_addr != SLAVE_ADDR2) {
+			/*
+			 * If the slave address is neither 0x70 nor 0x72,
+			 * it is not a SDVO device. Skip it.
+			 */
+			continue;
+		}
+		if (p_child->dvo_port != DEVICE_PORT_DVOB &&
+			p_child->dvo_port != DEVICE_PORT_DVOC) {
+			/* skip the incorrect SDVO port */
+			DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
+			continue;
+		}
+		DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
+				" %s port\n",
+				p_child->slave_addr,
+				(p_child->dvo_port == DEVICE_PORT_DVOB) ?
+					"SDVOB" : "SDVOC");
+		p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
+		if (!p_mapping->initialized) {
+			p_mapping->dvo_port = p_child->dvo_port;
+			p_mapping->slave_addr = p_child->slave_addr;
+			p_mapping->dvo_wiring = p_child->dvo_wiring;
+			p_mapping->ddc_pin = p_child->ddc_pin;
+			p_mapping->i2c_pin = p_child->i2c_pin;
+			p_mapping->initialized = 1;
+			DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
+				      p_mapping->dvo_port,
+				      p_mapping->slave_addr,
+				      p_mapping->dvo_wiring,
+				      p_mapping->ddc_pin,
+				      p_mapping->i2c_pin);
+		} else {
+			DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
+					 "two SDVO device.\n");
+		}
+		if (p_child->slave2_addr) {
+			/* Maybe this is a SDVO device with multiple inputs */
+			/* And the mapping info is not added */
+			DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
+				" is a SDVO device with multiple inputs.\n");
+		}
+		count++;
+	}
+
+	if (!count) {
+		/* No SDVO device info is found */
+		DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
+	}
+	return;
+}
+
+
+static void
+parse_driver_features(struct drm_psb_private *dev_priv,
+		      struct bdb_header *bdb)
+{
+	struct bdb_driver_features *driver;
+
+	driver = find_section(bdb, BDB_DRIVER_FEATURES);
+	if (!driver)
+		return;
+
+	if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
+		dev_priv->edp.support = 1;
+
+	dev_priv->lvds_enabled_in_vbt = driver->lvds_config != 0;
+	DRM_DEBUG_KMS("LVDS VBT config bits: 0x%x\n", driver->lvds_config);
+
+	/* This bit means to use 96Mhz for DPLL_A or not */
+	if (driver->primary_lfp_id)
+		dev_priv->dplla_96mhz = true;
+	else
+		dev_priv->dplla_96mhz = false;
+}
+
+static void
+parse_device_mapping(struct drm_psb_private *dev_priv,
+		       struct bdb_header *bdb)
+{
+	struct bdb_general_definitions *p_defs;
+	struct child_device_config *p_child, *child_dev_ptr;
+	int i, child_device_num, count;
+	u16	block_size;
+
+	p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
+	if (!p_defs) {
+		DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
+		return;
+	}
+	/* judge whether the size of child device meets the requirements.
+	 * If the child device size obtained from general definition block
+	 * is different with sizeof(struct child_device_config), skip the
+	 * parsing of sdvo device info
+	 */
+	if (p_defs->child_dev_size != sizeof(*p_child)) {
+		/* different child dev size . Ignore it */
+		DRM_DEBUG_KMS("different child size is found. Invalid.\n");
+		return;
+	}
+	/* get the block size of general definitions */
+	block_size = get_blocksize(p_defs);
+	/* get the number of child device */
+	child_device_num = (block_size - sizeof(*p_defs)) /
+				sizeof(*p_child);
+	count = 0;
+	/* get the number of child devices that are present */
+	for (i = 0; i < child_device_num; i++) {
+		p_child = &(p_defs->devices[i]);
+		if (!p_child->device_type) {
+			/* skip the device block if device type is invalid */
+			continue;
+		}
+		count++;
+	}
+	if (!count) {
+		DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
+		return;
+	}
+	dev_priv->child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
+	if (!dev_priv->child_dev) {
+		DRM_DEBUG_KMS("No memory space for child devices\n");
+		return;
+	}
+
+	dev_priv->child_dev_num = count;
+	count = 0;
+	for (i = 0; i < child_device_num; i++) {
+		p_child = &(p_defs->devices[i]);
+		if (!p_child->device_type) {
+			/* skip the device block if device type is invalid */
+			continue;
+		}
+		child_dev_ptr = dev_priv->child_dev + count;
+		count++;
+		memcpy((void *)child_dev_ptr, (void *)p_child,
+					sizeof(*p_child));
+	}
+	return;
+}
+
+
+/**
+ * psb_intel_init_bios - initialize VBIOS settings & find VBT
+ * @dev: DRM device
+ *
+ * Loads the Video BIOS and checks that the VBT exists.  Sets scratch registers
+ * to appropriate values.
+ *
+ * VBT existence is a sanity check that is relied on by other i830_bios.c code.
+ * Note that it would be better to use a BIOS call to get the VBT, as BIOSes may
+ * feed an updated VBT back through that, compared to what we'll fetch using
+ * this method of groping around in the BIOS data.
+ *
+ * Returns 0 on success, nonzero on failure.
+ */
+int psb_intel_init_bios(struct drm_device *dev)
+{
+	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+	struct vbt_header *vbt = NULL;
+	struct bdb_header *bdb = NULL;
+	u8 __iomem *bios = NULL;
+	size_t size;
+	int i;
+
+
+	dev_priv->panel_type = 0xff;
+
+	/* XXX Should this validation be moved to intel_opregion.c? */
+	if (dev_priv->opregion.vbt) {
+		struct vbt_header *vbt = dev_priv->opregion.vbt;
+		if (memcmp(vbt->signature, "$VBT", 4) == 0) {
+			DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n",
+					 vbt->signature);
+			bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset);
+		} else
+			dev_priv->opregion.vbt = NULL;
+	}
+
+	if (bdb == NULL) {
+		bios = pci_map_rom(pdev, &size);
+		if (!bios)
+			return -1;
+
+		/* Scour memory looking for the VBT signature */
+		for (i = 0; i + 4 < size; i++) {
+			if (!memcmp(bios + i, "$VBT", 4)) {
+				vbt = (struct vbt_header *)(bios + i);
+				break;
+			}
+		}
+
+		if (!vbt) {
+			dev_err(dev->dev, "VBT signature missing\n");
+			pci_unmap_rom(pdev, bios);
+			return -1;
+		}
+		bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
+	}
+
+	/* Grab useful general dxefinitions */
+	parse_general_features(dev_priv, bdb);
+	parse_driver_features(dev_priv, bdb);
+	parse_lfp_panel_data(dev_priv, bdb);
+	parse_sdvo_panel_data(dev_priv, bdb);
+	parse_sdvo_device_mapping(dev_priv, bdb);
+	parse_device_mapping(dev_priv, bdb);
+	parse_backlight_data(dev_priv, bdb);
+	parse_edp(dev_priv, bdb);
+
+	if (bios)
+		pci_unmap_rom(pdev, bios);
+
+	return 0;
+}
+
+/*
+ * Destroy and free VBT data
+ */
+void psb_intel_destroy_bios(struct drm_device *dev)
+{
+	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
+
+	kfree(dev_priv->sdvo_lvds_vbt_mode);
+	kfree(dev_priv->lfp_lvds_vbt_mode);
+	kfree(dev_priv->lvds_bl);
+}